/** Proofs GPU - Space and Time's cryptographic proof algorithms on the CPU and GPU.
 *
 * Copyright 2023-present Space and Time Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "sxt/base/functional/function_ref.h"

#include "sxt/base/test/unit_test.h"

using namespace sxt::basf;

static int f1() noexcept { return 1; }

TEST_CASE("function_ref is a non-owning, type-erased functor") {
  function_ref<int()> f;

  SECTION("we function_ref can wrap a lambda functor") {
    f = [] { return 2; };
    REQUIRE(f() == 2);
  }

  SECTION("we function_ref can wrap a normal function") {
    f = f1;
    REQUIRE(f() == 1);
  }
}
